import {Injectable} from '@angular/core';
import {Http, Headers} from '@angular/http';
import {StationTag} from '../entity/station-tag.model';
import {Observable} from 'rxjs/Observable';
import {AppConfig} from '../config';
import {InterceptorService} from './interceptor/interceptor-service';

@Injectable()
export class StationTagService {
  private readonly param = 'stations';

  private get url(): string {
    return `${AppConfig.APP_RESTFUL}/${this.param}`;
  }

  constructor(private http: InterceptorService) {
  }

  //请求关口表列表
  getStationTagsList(): Promise<StationTag[]> {
    return this.http.get(this.url)
      .toPromise()
      .then(response => response.data as StationTag[])
      .catch(this.handleError);
  }

  //根据风场id查询关口表列表
  getStationTagsByFarmId(id: number): Promise<StationTag[]> {
    const url = `${this.url}/farmId/${id}`;
    return this.http.get(url)
      .toPromise()
      .then(response => response.data as StationTag[])
      .catch(this.handleError);
  }

  //创建新关口表
  create(stationTags: StationTag): Promise<StationTag> {
    return this.http.post(this.url, JSON.stringify(stationTags))
      .toPromise()
      .then(res => {
        try {
          let result = res;
          switch (result.code) {
            case '200':
              return true;
            case '-1':
              throw new Error(result.message);
          }
        }
        catch (error) {
          this.handleError(error);
        }
      })
      .catch(this.handleError);
  }

  //编辑线路信息
  update(stationTags: StationTag): Promise<StationTag> {
    const url = `${this.url}`;
    return this.http
      .put(url, JSON.stringify(stationTags))
      .toPromise()
      .then(() => stationTags)
      .catch(this.handleError);
  }

  //删除
  delete(id: number): Promise<void> {
    const url = `${this.url}/${id}`;
    return this.http.delete(url)
      .toPromise()
      .then(() => null)
      .catch(this.handleError);
  }

  //批量线路删除
  batchDelete(keyIds: number[]): Promise<boolean> {
    const apiUrl = `${this.url}?items=${keyIds}`;
    return this.http.delete(apiUrl)
      .toPromise()
      .then(response => {
        try {
          let result = response;
          switch (result.code) {
            case '200':
              return true;
            case '-1':
              throw new Error(result.message);
          }
        }
        catch (error) {
          throw error;
        }

      })
      .catch(this.handleError);
  }

  //StationTagName判断是否已经存在
  hasStationTagName(stationTagName: string, stationTagId: number, farmId: number): Observable<boolean> {
    if (stationTagName === '')
      return Observable.of(true);

    const url = `${this.url}/stationTagName/${stationTagName}/stationTagId/${stationTagName}/farmId/${farmId}`;
    return this.http.get(url).map(response => {
      let code = response.code;
      switch (code) {
        case '3001':
          return true;
        case '3002':
          return false;
      }
    })
      .catch(this.handleError);
  }

  //StationTagCode判断是否已经存在
  hasStationTagCode(stationTagCode: string, stationTagId: number, farmId: number): Observable<boolean> {
    const url = `${this.url}/stationTagCode/${stationTagCode}/stationTagId/${stationTagId}/farmId/${farmId}`;
    return this.http.get(url).map(response => {
      let code = response.code;
      switch (code) {
        case '3001':
          return true;
        case '3002':
          return false;
      }
    })
      .catch(this.handleError);
  }

  private handleError(error: any): Promise<any> {
    // console.error('An error occurred', error); // for demo purposes only
    return Promise.reject(error.message || error);
  }

}


// WEBPACK FOOTER //
// ./src/app/service/station-tag.service.ts
